I have just got a North Eastern Railway Guards Handlamp. On the rear of the reflector it is etched with the letters N.E.R.R.H. ? The last letter I cannot make out. But has a vertical bar to the left and may have a cross bar at half height. To me the first 3 would most likely be standing for North Eastern Railway. Does anyone have any ideas as to the meaning of the last 3 ? Would they be for a Depot location or the initials of a guard that it was issued too? Any information appreciated.